EP1782024B1 - Two-pointer speedometer for indicating an effective speed and a reference speed - Google Patents

Two-pointer speedometer for indicating an effective speed and a reference speed Download PDF

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Publication number
EP1782024B1
EP1782024B1 EP05793419.2A EP05793419A EP1782024B1 EP 1782024 B1 EP1782024 B1 EP 1782024B1 EP 05793419 A EP05793419 A EP 05793419A EP 1782024 B1 EP1782024 B1 EP 1782024B1
Authority
EP
European Patent Office
Prior art keywords
light
dial
pointer
speedometer
needle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05793419.2A
Other languages
German (de)
French (fr)
Other versions
EP1782024A1 (en
Inventor
Joël FOURNIER
Stéphane VOILLOT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnson Controls Technology Co
Original Assignee
Johnson Controls Technology Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson Controls Technology Co filed Critical Johnson Controls Technology Co
Publication of EP1782024A1 publication Critical patent/EP1782024A1/en
Application granted granted Critical
Publication of EP1782024B1 publication Critical patent/EP1782024B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/28—Structurally-combined illuminating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/215—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays characterised by the combination of multiple visual outputs, e.g. combined instruments with analogue meters and additional displays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D13/00—Component parts of indicators for measuring arrangements not specially adapted for a specific variable
    • G01D13/22—Pointers, e.g. settable pointer
    • G01D13/26—Pointers, e.g. settable pointer adapted to perform a further operation, e.g. making electrical contact
    • G01D13/265—Pointers which conduct light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/33—Illumination features
    • B60K2360/336—Light guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/60—Structural details of dashboards or instruments
    • B60K2360/68—Features of instruments
    • B60K2360/698—Pointers of combined instruments
    • B60K2360/6992—Light conducting pointers

Definitions

  • the invention relates to a needle speed indicator with a second indicator hand of a reference speed.
  • the dashboard of a motor vehicle generally comprises a dashboard, located in front of the driver, which comprises a set of indicators, including a speedometer, which can be needle.
  • the pointer of the speedometer controlled and driven in rotation by a motor, or movement, generally extends in front of a silkscreened support bearing indicating characters (especially graduations and speed values) forming a dial. speeds.
  • the indication character support is named front panel.
  • the speedometer is mounted in a covering flange serving as protection and cover and supporting a protective glass.
  • the prior art proposes speed indicators in which a series of light-emitting diodes (LEDs) has been placed at the periphery of the dial, the LED corresponding to the reference speed being on. Having such a large number of LEDs, however, is very expensive and considerably increases the price of the dashboard. The accuracy of the indication of a speed, discretized because of the juxtaposition of the LEDs, is also quite poor.
  • LEDs light-emitting diodes
  • the document WO 01/92047 proposes an indicator comprising a first pointer indicating the effective speed of the vehicle, extending in front of the front face, and a second needle, bent, indicative of a reference speed and located at the rear of the front face, of which one only sees the end of the bent portion at the periphery of the dial.
  • the indicator comprises a first light box, at the bottom of which are mounted, on a first printed circuit board, LED lighting of the dial pointed by the indicator pointer of the effective speed, and a second box light, in which extends the bent needle, the dial pointed by this needle being illuminated by LEDs mounted on a second printed circuit board located at the rear of the second light box, and also carrying a motor. the two needles.
  • This indicator is, however, very bulky, because of the depth required for all the two needles and drive means and lighting. In addition, the needles are not lit.
  • the invention relates to a speed indicator, comprising a front face supporting a dial, a first pointer indicating the effective speed, rotated in front of the dial, a second pointer needle of a reference speed, driven in rotation behind the dial and having an end portion visible at the periphery of the dial, and means for illuminating the two hands and the dial, an indicator characterized in that the lighting means comprise a single source of illumination common to the two hands and the dial.
  • the dial support is mounted on a light pipe mounted in a first light box, the first indicator needle is light-conducting, the second indicator needle is light-conducting, mounted in a second light box. the back of the first light box, a printed circuit board, on which is mounted the light source, being provided at the rear of the second hand.
  • the two needles are rotated by two concentric drive shafts and rotated by a single motor mounted on the printed circuit board.
  • the second needle comprises an arm, the first end of which comprises a hub for receiving its drive shaft and the second end comprises a bent portion, the end of which is visible on the periphery of the dial.
  • the arm of the second needle comprises, near its first end, at least one inclined panel which partially reflects the light emitted by the lighting source in the arm and partially passes it to the conduit of light, by a recess in the first light box.
  • the light pipe is arranged to diffuse the light from the light source, to illuminate the dial, and to let part of this light for the illumination of the first needle.
  • the invention is particularly applicable to a speedometer of a motor vehicle dashboard, but the applicant does not intend to limit the scope of its rights to this application alone. It can especially be a speedometer of any locomotion machine.
  • the speed indicator 1 described here is a speedometer of the dashboard of a motor vehicle. It is part of a set of indicators contained in the dashboard, which comprises in this case a protective glass held by a dressing flange, not shown.
  • the flange also serves as a cache for the indicators. It comprises a portion forming a generally transverse conduit to the protective glass, extending rearwardly and providing the connection with a front face 2, supporting the dials of the indicators. It comprises another part, called bottom flange, or facade 3, covering the front face 2 outside the indicators; the facade 3 forms a sort of mask through which we see only the indicators, by recesses in their positions.
  • the indicator 1 comprises a first needle 4, indicative of the effective speed of the vehicle, of generally rectilinear shape, rotatably mounted in front of the front face 2, the latter bearing screen printed characters forming a speed dial 5.
  • the indication characters here comprise graduations 6, forming a scale of counting velocities, distributed in an arc of circle on the front face 2, and numbers 7, assigning velocity values to the graduations 6.
  • the dial 5 is graduated from 0 Km / h to 240 Km / h.
  • Graduations 6 are screen printed every 5 Km / h, figures every 20 Km / h.
  • the arc of circle on which the graduations 6 are shown three quarters of a circle.
  • a lens 8, forming a light pipe, is mounted at the rear of the front face 2.
  • This lens 8 is in this case in the form of a disk portion, whose periphery follows the contour of the arc defined by the graduations 6 of the dial 5, the quarter disc of the front face 2 corresponding to the non-graduated portion of the dial 5 being supported by a single opaque wall.
  • the lens 8 is mounted in a first light box 9. At the rear of this first light box 9, behind its bottom wall, is rotatably mounted in a second light box 10, a second needle 11. This second light box 10 forms a cavity under three quarters of graduated disk of the dial 5.
  • Front and rear means in the direction of the driver and in the opposite direction, relative to the dashboard.
  • a printed circuit board 12 parallel to the front face 2, which controls and supplies the indicator 1, in this case the set of indicators of the dashboard of the vehicle.
  • the drive motor 13 comprises another shaft 17, hereinafter referred to as the first shaft 17, extending concentrically with the second shaft 14, which passes through the second needle 11 to be fitted into a hub 18 of the first needle 4, the latter passing through the bottom wall of the first light box 9, the lens 8 and the front face 2, by recesses 19, 20, 21, respectively, provided for this purpose.
  • the hub 18 of the first needle 4 is integral with a first end of the first needle 4, to which it is generally perpendicular, the second end of this needle 4 indicating values on the dial 5.
  • the two shafts 14, 17 are rotated independently of each other by the motor 13, to allow the first needle 4 to indicate the values of the effective speed of the vehicle, to the second hand 11 of indicate the value of a reference speed.
  • the second needle 11 comprises, from its first end, an arm 11 ', which comprises, at its second end, a bent portion 22, whose end extends substantially perpendicular to the front face 2.
  • the arm 11' extends at the rear of the first light box 9, generally parallel to the front face 2, slightly curved forward, from its first end to its second end, to follow, offset from it, the shape of the convex lens 8, to its periphery, beyond which the needle 11 comprises its bent portion 22.
  • the end of the bent portion 22 of the second hand 11 is visible by the driver of the vehicle through a recess 23 in an arc of circle formed on the facade 3.
  • the facade 3 comprises, around the dial 5, an annular portion 24 raised with respect to the front face 2 which delimits the dial 5, for aesthetic purposes. It is along this annular portion 24 that the recess 23 is drilled.
  • This recess 23 forms here a semicircle situated angularly between 40 Km / h and 200 Km / h on the dial 5.
  • a reference speed, between these speeds, may be indicated by the position of the end of the bent portion 22 of the second needle 11 in the recess 23, visibly by the driver.
  • a light source consisting, in this case, of a plurality of LEDs. 25, here four in number. These LEDs 25 are arranged to illuminate both the end of the bent portion 22 of the second needle 11, the dial 5 and the first needle 4 when they are lit.
  • the second needle 11 comprises a transparent light-conducting material.
  • the LEDs 25 being located at the rear of the second light box 10, they directly illuminate the second needle 11, the arm 11 'comprises, at its first end, which is located near the LEDs 25, sections inclined 26 which partially reflect the light emitted by the LEDs 25 in the arm 11 'of the needle 11 towards its second end.
  • the needle 11 being light conducting, the light is guided to its bent portion 22, which also comprises a pan 22 'reflecting the light towards its end; the end of the bent portion 22 of the second hand 11 is therefore bright, if the LEDs 25 are lit, for the driver who sees it through the recess 23 of the facade 3.
  • the four LEDs 25 are regularly spaced, diametrically opposite two by two, the second needle 11 is of sufficient thickness to receive uniform illumination from the LEDs 25 regardless of its angular position.
  • the recess 19 of the bottom of the first light box 9 for passing the hub 18 of the first needle 4 is widened in order to let part of the light emitted by the LEDs 25 into the lens 8.
  • the light emitted by the LEDs 25 propagates towards this recess 19, directly and / or through the second needle 11, which is transparent, the light propagating in this needle 11 being, as mentioned above, partially reflected by the blanks inclined 26 and guided in its arm 11 ', partially transmitted to the lens 8.
  • the dial 5 is thus illuminated by the light diffused in the lens 8 while being contained by the first light box 9.
  • the face before 2 is translucent and silkscreen opaque, the graduations 6 and the numbers 7 being drawn by ink gap in their outline or by a translucent ink.
  • the graduations 6 and the numbers 7 are seen by day, since they are not of the same color as the opaque screen-printed ink on the front face 2, and at night, if the LEDs 25 are lit, since they are then backlit and transparent by the LEDs 25 via the lens 8.
  • the recess 20 of the lens 8 passing through the hub 18 of the first needle 4 is of frustoconical shape, with its small diameter on the rear side.
  • the light passing through the recess 19 of the bottom of the first light box 9 is reflected by the inclined portion of the frustoconical recess 20 in the lens 8 to be diffused and illuminate the dial 5 and transmitted forwardly in the direction of the first needle 4.
  • This needle 4 has, in line with the frustoconical recess 20, a cover 27, which collects the light coming from the frustoconical recess 20 and guides it into the elongate body of the needle 4.
  • the body of the needle 4 comprises a light-conducting and translucent material, and is thus illuminated.
  • a needle speed indicator 1 which comprises a pointer 11 indicative of a reference speed, driven by a motor 13 and therefore precise as to the indication of the speed, which is compact and little expensive.
  • a single printed circuit board 12 is required, comprising a light source 25 which simultaneously illuminates the visible portion of the pointer 11 indicating a reference speed, the dial 5 and the pointer 4 indicating the effective speed of the vehicle.
  • dial 5 could be arranged differently, for example illuminated on the whole of its surface, with the characters of indication 6, 7, screen-printed opaque, appearing in Chinese shadows.
  • the drive motor 13 has been described as a single motor with two coaxial shafts 14, 17, but two motors could be provided with two off-axis shafts, or a single motor with two off-axis shafts, the various indication paths being adapted to this configuration; with a minimum offset, it is possible to have the illusion that the needles have the same center of rotation, for example by using a second needle whose thickness is greater than that of the recess by which it is seen , implying that we do not know that in fact we do not see the same part of this needle as it rotates.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Measuring Devices (AREA)
  • Instrument Panels (AREA)

Description

L'invention concerne un indicateur de vitesses à aiguille, avec une deuxième aiguille indicatrice d'une vitesse de référence.The invention relates to a needle speed indicator with a second indicator hand of a reference speed.

La planche de bord d'un véhicule automobile comprend généralement un tableau de bord, situé face au conducteur, qui comprend un ensemble d'indicateurs, notamment un indicateur de vitesses, qui peut être à aiguille.The dashboard of a motor vehicle generally comprises a dashboard, located in front of the driver, which comprises a set of indicators, including a speedometer, which can be needle.

L'aiguille de l'indicateur de vitesses, commandée et entraînée en rotation par un moteur, ou mouvement, s'étend généralement devant un support sérigraphié portant des caractères d'indication (des graduations et des valeurs de vitesses, notamment), formant cadran de vitesses. Le support des caractères d'indication est nommé face avant. L'indicateur de vitesses est monté dans un réhaut d'habillage servant de protection et de cache et supportant une vitre de protection.The pointer of the speedometer, controlled and driven in rotation by a motor, or movement, generally extends in front of a silkscreened support bearing indicating characters (especially graduations and speed values) forming a dial. speeds. The indication character support is named front panel. The speedometer is mounted in a covering flange serving as protection and cover and supporting a protective glass.

Il est devenu commun de désirer faire apparaître une vitesse de référence sur le cadran de vitesses, que ce soit la vitesse de référence d'un régulateur de vitesse ou d'un limiteur de vitesse, par exemple. Le conducteur peut ainsi lire, sur le même indicateur, la vitesse effective du véhicule et la vitesse sur laquelle il a réglé son moteur, ou celle qu'il ne doit pas dépasser, dans ces cas-là. Cette lecture doit pouvoir être effectuée de jour comme de nuit.It has become common to desire to show a reference speed on the speed dial, whether it is the reference speed of a cruise control or a speed limiter, for example. The driver can thus read, on the same indicator, the actual speed of the vehicle and the speed on which he has adjusted his engine, or that he must not exceed, in these cases. This reading must be able to be performed day and night.

L'art antérieur propose des indicateurs de vitesses dans lesquels une série de diodes électroluminescentes (LED) a été placée à la périphérie du cadran, la LED correspondant à la vitesse de référence étant allumée. Disposer un tel nombre de LED est toutefois très coûteux et augmente considérablement le prix du tableau de bord. La précision de l'indication d'une vitesse, discrétisée du fait de la juxtaposition des LED, est en outre assez pauvre.The prior art proposes speed indicators in which a series of light-emitting diodes (LEDs) has been placed at the periphery of the dial, the LED corresponding to the reference speed being on. Having such a large number of LEDs, however, is very expensive and considerably increases the price of the dashboard. The accuracy of the indication of a speed, discretized because of the juxtaposition of the LEDs, is also quite poor.

Le document WO 01/92047 propose un indicateur comportant une première aiguille indicatrice de la vitesse effective du véhicule, s'étendant devant la face avant, et une deuxième aiguille, coudée, indicatrice d'une vitesse de référence et située à l'arrière de la face avant, dont on ne voit que l'extrémité de la portion coudée en périphérie du cadran. L'indicateur comprend une première boîte à lumière, au fond de laquelle sont montées, sur une première carte de circuit imprimé, des LED d'éclairage du cadran pointé par l'aiguille indicatrice de la vitesse effective, et une deuxième boîte à lumière, dans laquelle s'étend l'aiguille coudée, le cadran pointé par cette aiguille étant éclairé par des LED montées sur une deuxième carte de circuit imprimé située à l'arrière de la deuxième boîte à lumière, et portant également un moteur d'entraînement des deux aiguilles. Cet indicateur est toutefois très volumineux, du fait de la profondeur requise pour l'ensemble des deux aiguilles et des moyens d'entraînement et d'éclairage. Par ailleurs, les aiguilles ne sont pas éclairées.The document WO 01/92047 proposes an indicator comprising a first pointer indicating the effective speed of the vehicle, extending in front of the front face, and a second needle, bent, indicative of a reference speed and located at the rear of the front face, of which one only sees the end of the bent portion at the periphery of the dial. The indicator comprises a first light box, at the bottom of which are mounted, on a first printed circuit board, LED lighting of the dial pointed by the indicator pointer of the effective speed, and a second box light, in which extends the bent needle, the dial pointed by this needle being illuminated by LEDs mounted on a second printed circuit board located at the rear of the second light box, and also carrying a motor. the two needles. This indicator is, however, very bulky, because of the depth required for all the two needles and drive means and lighting. In addition, the needles are not lit.

La présente invention vise à proposer un indicateur de vitesses à aiguille, avec une deuxième aiguille indicatrice d'une vitesse de référence, qui soit à la fois compact et peu coûteux.It is an object of the present invention to provide a needle speed indicator with a second indicator needle of a reference speed which is both compact and inexpensive.

A cet effet, l'invention concerne un indicateur de vitesses, comprenant une face avant supportant un cadran, une première aiguille indicatrice de la vitesse effective, entraînée en rotation devant le cadran, une deuxième aiguille indicatrice d'une vitesse de référence, entraînée en rotation derrière le cadran et comportant une portion d'extrémité visible en périphérie du cadran, et des moyens d'éclairage des deux aiguilles et du cadran, indicateur caractérisé par le fait que les moyens d'éclairage comprennent une source d'éclairage unique commune aux deux aiguilles et au cadran.To this end, the invention relates to a speed indicator, comprising a front face supporting a dial, a first pointer indicating the effective speed, rotated in front of the dial, a second pointer needle of a reference speed, driven in rotation behind the dial and having an end portion visible at the periphery of the dial, and means for illuminating the two hands and the dial, an indicator characterized in that the lighting means comprise a single source of illumination common to the two hands and the dial.

Grâce à l'invention, on peut proposer un indicateur de vitesses compact et peu coûteux, dont les deux aiguilles sont éclairées.Thanks to the invention, it is possible to provide a compact and inexpensive speed indicator whose two hands are illuminated.

Selon l'invention, le support de cadran est monté sur un conduit de lumière monté dans une première boîte à lumière, la première aiguille indicatrice est conductrice de lumière, la deuxième aiguille indicatrice est conductrice de lumière, montée dans une deuxième boîte à lumière à l'arrière de la première boîte à lumière, une carte de circuit imprimé, sur laquelle est montée la source d'éclairage, étant prévue à l'arrière de la deuxième aiguille.According to the invention, the dial support is mounted on a light pipe mounted in a first light box, the first indicator needle is light-conducting, the second indicator needle is light-conducting, mounted in a second light box. the back of the first light box, a printed circuit board, on which is mounted the light source, being provided at the rear of the second hand.

Dans ce cas, il n'est donc prévu qu'une seule carte de circuit imprimé.In this case, it is therefore provided only one printed circuit board.

De préférence, les deux aiguilles sont entraînées en rotation par deux arbres d'entraînement concentriques et entraînés en rotation par un unique moteur monté sur la carte de circuit imprimé.Preferably, the two needles are rotated by two concentric drive shafts and rotated by a single motor mounted on the printed circuit board.

De préférence encore, la deuxième aiguille comprend un bras, dont la première extrémité comprend un moyeu de réception de son arbre d'entraînement et la deuxième extrémité comprend une portion coudée, dont l'extrémité est visible en périphérie du cadran.More preferably, the second needle comprises an arm, the first end of which comprises a hub for receiving its drive shaft and the second end comprises a bent portion, the end of which is visible on the periphery of the dial.

Avantageusement, dans ce cas, le bras de la deuxième aiguille comprend, à proximité de sa première extrémité, au moins un pan incliné qui réfléchit partiellement la lumière émise par la source d'éclairage dans le bras et la laisse passer partiellement vers le conduit de lumière, par un évidement ménagé dans la première boîte à lumière.Advantageously, in this case, the arm of the second needle comprises, near its first end, at least one inclined panel which partially reflects the light emitted by the lighting source in the arm and partially passes it to the conduit of light, by a recess in the first light box.

Avantageusement encore, le conduit de lumière est agencé pour diffuser la lumière issue de la source d'éclairage, pour éclairer le cadran, et pour laisser passer une partie de cette lumière pour l'éclairage de la première aiguille.Advantageously, the light pipe is arranged to diffuse the light from the light source, to illuminate the dial, and to let part of this light for the illumination of the first needle.

L'invention s'applique particulièrement bien à un indicateur de vitesses d'un tableau de bord de véhicule automobile, mais la demanderesse n'entend pas limiter la portée de ses droits à cette seule application. Il peut notamment s'agir d'un indicateur de vitesses de tout engin de locomotion.The invention is particularly applicable to a speedometer of a motor vehicle dashboard, but the applicant does not intend to limit the scope of its rights to this application alone. It can especially be a speedometer of any locomotion machine.

L'invention sera mieux comprise à l'aide de la description suivante de la forme de réalisation préférée de l'indicateur de l'invention, en référence au dessin annexé, sur lequel :

  • la figure 1 représente une vue partielle en coupe de l'indicateur de l'invention et
  • la figure 2 représente une vue de face de l'indicateur de la figure 1.
The invention will be better understood with the aid of the following description of the preferred embodiment of the indicator of the invention, with reference to the appended drawing, in which:
  • the figure 1 represents a partial sectional view of the indicator of the invention and
  • the figure 2 represents a front view of the indicator of the figure 1 .

En référence à la figure 1, l'indicateur de vitesses 1 ici décrit est un indicateur de vitesses du tableau de bord d'un véhicule automobile. Il fait partie d'un ensemble d'indicateurs contenus dans le tableau de bord, qui comporte en l'espèce une vitre de protection tenue par un réhaut d'habillage, non représentés. Le réhaut sert également de cache aux indicateurs. Il comprend une partie formant un conduit globalement transversal à la vitre de protection, s'étendant vers l'arrière et assurant la liaison avec une face avant 2, support des cadrans des indicateurs. Il comporte une autre partie, appelée fond de réhaut, ou façade 3, couvrant la face avant 2 en dehors des indicateurs ; la façade 3 forme en quelque sorte un masque au travers duquel on ne voit que les indicateurs, par des évidements prévus à leurs positions.With reference to the figure 1 , the speed indicator 1 described here is a speedometer of the dashboard of a motor vehicle. It is part of a set of indicators contained in the dashboard, which comprises in this case a protective glass held by a dressing flange, not shown. The flange also serves as a cache for the indicators. It comprises a portion forming a generally transverse conduit to the protective glass, extending rearwardly and providing the connection with a front face 2, supporting the dials of the indicators. It comprises another part, called bottom flange, or facade 3, covering the front face 2 outside the indicators; the facade 3 forms a sort of mask through which we see only the indicators, by recesses in their positions.

L'indicateur 1 comprend une première aiguille 4, indicatrice de la vitesse effective du véhicule, de forme globalement rectiligne, montée rotative devant la face avant 2, cette dernière portant des caractères d'indication sérigraphiés formant un cadran de vitesses 5. En référence à la figure 2, les caractères d'indication comportent ici des graduations 6, formant une échelle de comptage de vitesses, réparties en arc de cercle sur la face avant 2, et des nombres 7, assignant des valeurs de vitesses aux graduations 6. En l'espèce, le cadran 5 est gradué de 0 Km/h à 240 Km/h. Des graduations 6 sont sérigraphiées tous les 5 Km/h, des chiffres tous les 20 Km/h. L'arc de cercle sur lequel sont portées les graduations 6 forme les trois quarts d'un cercle.The indicator 1 comprises a first needle 4, indicative of the effective speed of the vehicle, of generally rectilinear shape, rotatably mounted in front of the front face 2, the latter bearing screen printed characters forming a speed dial 5. With reference to the figure 2 , the indication characters here comprise graduations 6, forming a scale of counting velocities, distributed in an arc of circle on the front face 2, and numbers 7, assigning velocity values to the graduations 6. In this case, the dial 5 is graduated from 0 Km / h to 240 Km / h. Graduations 6 are screen printed every 5 Km / h, figures every 20 Km / h. The arc of circle on which the graduations 6 are shown three quarters of a circle.

Une lentille 8, formant conduit de lumière, est montée à l'arrière de la face avant 2. Cette lentille 8 est en l'espèce en forme de portion de disque, dont la périphérie suit le contour de l'arc de cercle défini par les graduations 6 du cadran 5, le quart de disque de la face avant 2 correspondant à la portion non graduée du cadran 5 étant supporté par une simple paroi opaque. La lentille 8 est montée dans une première boîte à lumière 9. A l'arrière de cette première boîte à lumière 9, derrière sa paroi de fond, est montée rotative, dans une deuxième boîte à lumière 10, une deuxième aiguille 11. Cette deuxième boîte à lumière 10 forme une cavité sous les trois quarts de disque gradués du cadran 5.A lens 8, forming a light pipe, is mounted at the rear of the front face 2. This lens 8 is in this case in the form of a disk portion, whose periphery follows the contour of the arc defined by the graduations 6 of the dial 5, the quarter disc of the front face 2 corresponding to the non-graduated portion of the dial 5 being supported by a single opaque wall. The lens 8 is mounted in a first light box 9. At the rear of this first light box 9, behind its bottom wall, is rotatably mounted in a second light box 10, a second needle 11. This second light box 10 forms a cavity under three quarters of graduated disk of the dial 5.

Par avant et arrière, on entend dans la direction du conducteur et dans la direction opposée, par rapport au tableau de bord.Front and rear means in the direction of the driver and in the opposite direction, relative to the dashboard.

Derrière la deuxième aiguille 11, s'étend une carte de circuit imprimé 12, parallèle à la face avant 2, qui commande et alimente l'indicateur 1, en l'espèce l'ensemble des indicateurs du tableau de bord du véhicule. A l'arrière de cette carte de circuit imprimé 12 est monté un moteur 13 d'entraînement des aiguilles 4, 11, qui comporte un arbre 14, ci-après dénommé deuxième arbre 14, traversant vers l'avant la carte de circuit imprimé 12 par un évidement 15 prévu à cet effet, perpendiculairement à la carte 12, et emmanché dans un moyeu 16 de la deuxième aiguille 11, situé à une première extrémité de cette aiguille 11.Behind the second needle 11, extends a printed circuit board 12, parallel to the front face 2, which controls and supplies the indicator 1, in this case the set of indicators of the dashboard of the vehicle. At the rear of this printed circuit board 12 is mounted a motor 13 for driving the needles 4, 11, which comprises a shaft 14, hereinafter referred to as the second shaft 14, passing forwards through the printed circuit board 12 by a recess 15 provided for this purpose, perpendicular to the card 12, and fitted into a hub 16 of the second needle 11, located at a first end of the needle 11.

Le moteur d'entraînement 13 comporte un autre arbre 17, ci-après dénommé premier arbre 17, s'étendant concentriquement au deuxième arbre 14, qui traverse la deuxième aiguille 11 pour être emmanché dans un moyeu 18 de la première aiguille 4, ce dernier traversant la paroi de fond de la première boîte à lumière 9, la lentille 8 et la face avant 2, par des évidements 19, 20, 21, respectivement, prévus à cet effet. Le moyeu 18 de la première aiguille 4 est solidaire d'une première extrémité de la première aiguille 4, à laquelle il est globalement perpendiculaire, la seconde extrémité de cette aiguille 4 indiquant des valeurs sur le cadran 5.The drive motor 13 comprises another shaft 17, hereinafter referred to as the first shaft 17, extending concentrically with the second shaft 14, which passes through the second needle 11 to be fitted into a hub 18 of the first needle 4, the latter passing through the bottom wall of the first light box 9, the lens 8 and the front face 2, by recesses 19, 20, 21, respectively, provided for this purpose. The hub 18 of the first needle 4 is integral with a first end of the first needle 4, to which it is generally perpendicular, the second end of this needle 4 indicating values on the dial 5.

Les deux arbres 14, 17 sont entraînés en rotation indépendamment l'un de l'autre par le moteur 13, afin de permettre à la première aiguille 4 d'indiquer les valeurs de la vitesse effective du véhicule, à la deuxième aiguille 11 d'indiquer la valeur d'une vitesse de référence.The two shafts 14, 17 are rotated independently of each other by the motor 13, to allow the first needle 4 to indicate the values of the effective speed of the vehicle, to the second hand 11 of indicate the value of a reference speed.

La deuxième aiguille 11 comporte, à partir de sa première extrémité, un bras 11', qui comporte, à sa seconde extrémité, une portion coudée 22, dont l'extrémité s'étend sensiblement perpendiculairement à la face avant 2. Le bras 11' s'étend à l'arrière de la première boîte à lumière 9, globalement parallèlement à la face avant 2, légèrement courbé vers l'avant, depuis sa première extrémité jusqu'à sa seconde extrémité, pour suivre, décalé par rapport à elle, la forme de la lentille 8, convexe, jusqu'à sa périphérie, au-delà de laquelle l'aiguille 11 comprend sa portion coudée 22.The second needle 11 comprises, from its first end, an arm 11 ', which comprises, at its second end, a bent portion 22, whose end extends substantially perpendicular to the front face 2. The arm 11' extends at the rear of the first light box 9, generally parallel to the front face 2, slightly curved forward, from its first end to its second end, to follow, offset from it, the shape of the convex lens 8, to its periphery, beyond which the needle 11 comprises its bent portion 22.

L'extrémité de la portion coudée 22 de la deuxième aiguille 11 est visible par le conducteur du véhicule grâce à un évidement 23 en arc de cercle pratiqué sur la façade 3. En l'espèce, la façade 3 comprend, autour du cadran 5, une portion annulaire 24 surélevée par rapport à la face avant 2 qui délimite le cadran 5, dans un but esthétique. C'est le long de cette portion annulaire 24 qu'est percé l'évidement 23. Cet évidement 23 forme ici un demi-cercle situé angulairement entre 40 Km/h et 200 Km/h sur le cadran 5. Une vitesse de référence, comprise entre ces vitesses, peut être indiquée par la position de l'extrémité de la portion coudée 22 de la deuxième aiguille 11 dans l'évidement 23, de façon visible par le conducteur.The end of the bent portion 22 of the second hand 11 is visible by the driver of the vehicle through a recess 23 in an arc of circle formed on the facade 3. In this case, the facade 3 comprises, around the dial 5, an annular portion 24 raised with respect to the front face 2 which delimits the dial 5, for aesthetic purposes. It is along this annular portion 24 that the recess 23 is drilled. This recess 23 forms here a semicircle situated angularly between 40 Km / h and 200 Km / h on the dial 5. A reference speed, between these speeds, may be indicated by the position of the end of the bent portion 22 of the second needle 11 in the recess 23, visibly by the driver.

Du côté avant de la carte de circuit imprimé 12, autour de son évidement 15 de passage des arbres 14, 17 du moteur d'entraînement 13, est montée une source d'éclairage constituée, en l'espèce, d'une pluralité de LED 25, ici au nombre de quatre. Ces LED 25 sont agencées pour, lorsqu'elles sont allumées, éclairer à la fois l'extrémité de la portion coudée 22 de la deuxième aiguille 11, le cadran 5 et la première aiguille 4.On the front side of the printed circuit board 12, around its recess 15 for the passage of the shafts 14, 17 of the drive motor 13, is mounted a light source consisting, in this case, of a plurality of LEDs. 25, here four in number. These LEDs 25 are arranged to illuminate both the end of the bent portion 22 of the second needle 11, the dial 5 and the first needle 4 when they are lit.

En effet, la deuxième aiguille 11 comprend une matière transparente conductrice de lumière. Les LED 25 étant situées à l'arrière de la deuxième boîte à lumière 10, elles éclairent directement la deuxième aiguille 11, dont le bras 11' comprend, au niveau de sa première extrémité, qui est située à proximité des LED 25, des pans inclinés 26 qui réfléchissent partiellement la lumière émise par les LED 25 dans le bras 11' de l'aiguille 11 en direction de sa deuxième extrémité. L'aiguille 11 étant conductrice de lumière, la lumière est guidée jusqu'à sa portion coudée 22, qui comprend également un pan 22' réfléchissant la lumière vers son extrémité ; l'extrémité de la portion coudée 22 de la deuxième aiguille 11 est donc lumineuse, si les LED 25 sont allumées, pour le conducteur qui la voit par l'évidement 23 de la façade 3. Les quatre LED 25 étant régulièrement espacées, diamétralement opposées deux par deux, la deuxième aiguille 11 est d'une épaisseur suffisante pour recevoir un éclairage uniforme de la part des LED 25 quelle que soit sa position angulaire.Indeed, the second needle 11 comprises a transparent light-conducting material. The LEDs 25 being located at the rear of the second light box 10, they directly illuminate the second needle 11, the arm 11 'comprises, at its first end, which is located near the LEDs 25, sections inclined 26 which partially reflect the light emitted by the LEDs 25 in the arm 11 'of the needle 11 towards its second end. The needle 11 being light conducting, the light is guided to its bent portion 22, which also comprises a pan 22 'reflecting the light towards its end; the end of the bent portion 22 of the second hand 11 is therefore bright, if the LEDs 25 are lit, for the driver who sees it through the recess 23 of the facade 3. The four LEDs 25 are regularly spaced, diametrically opposite two by two, the second needle 11 is of sufficient thickness to receive uniform illumination from the LEDs 25 regardless of its angular position.

En outre, l'évidement 19, du fond de la première boîte à lumière 9, de passage du moyeu 18 de la première aiguille 4, est élargi afin de laisser passer une partie de la lumière émise par les LED 25 dans la lentille 8. La lumière émise par les LED 25 se propage vers cet évidement 19, directement et/ou à travers la deuxième aiguille 11, qui est transparente, la lumière se propageant dans cette aiguille 11 étant, comme rappelé ci-dessus, partiellement réfléchie par les pans inclinés 26 et guidée dans son bras 11', partiellement transmise vers la lentille 8. Le cadran 5 est ainsi éclairé par la lumière diffusée dans la lentille 8 tout en étant contenue par la première boîte à lumière 9. En l'espèce, la face avant 2 est translucide et sérigraphiée de façon opaque, les graduations 6 et les nombres 7 étant dessinés par lacune d'encre à leur contour ou par une encre translucide. Ainsi, les graduations 6 et les nombres 7 se voient de jour, puisqu'ils ne sont pas de la même couleur que l'encre opaque sérigraphiée sur la face avant 2, et de nuit, si les LED 25 sont allumées, puisqu'ils sont alors éclairés par l'arrière et par transparence par les LED 25, via la lentille 8.In addition, the recess 19 of the bottom of the first light box 9 for passing the hub 18 of the first needle 4 is widened in order to let part of the light emitted by the LEDs 25 into the lens 8. The light emitted by the LEDs 25 propagates towards this recess 19, directly and / or through the second needle 11, which is transparent, the light propagating in this needle 11 being, as mentioned above, partially reflected by the blanks inclined 26 and guided in its arm 11 ', partially transmitted to the lens 8. The dial 5 is thus illuminated by the light diffused in the lens 8 while being contained by the first light box 9. In this case, the face before 2 is translucent and silkscreen opaque, the graduations 6 and the numbers 7 being drawn by ink gap in their outline or by a translucent ink. Thus, the graduations 6 and the numbers 7 are seen by day, since they are not of the same color as the opaque screen-printed ink on the front face 2, and at night, if the LEDs 25 are lit, since they are then backlit and transparent by the LEDs 25 via the lens 8.

Enfin, l'évidement 20, de la lentille 8, de passage du moyeu 18 de la première aiguille 4, est de forme tronconique, avec son petit diamètre du côté arrière. Ainsi, la lumière qui traverse l'évidement 19 du fond de la première boîte à lumière 9 est réfléchie par le pan incliné de l'évidement tronconique 20 dans la lentille 8 pour y être diffusée et éclairer le cadran 5 et transmise vers l'avant en direction de la première aiguille 4. Cette aiguille 4 possède, au droit de l'évidement tronconique 20, un capot 27, qui collecte la lumière provenant de l'évidement tronconique 20 et la guide dans le corps allongé de l'aiguille 4. Le corps de l'aiguille 4 comprend une matière conductrice de lumière et translucide, et est ainsi éclairé.Finally, the recess 20 of the lens 8 passing through the hub 18 of the first needle 4 is of frustoconical shape, with its small diameter on the rear side. Thus, the light passing through the recess 19 of the bottom of the first light box 9 is reflected by the inclined portion of the frustoconical recess 20 in the lens 8 to be diffused and illuminate the dial 5 and transmitted forwardly in the direction of the first needle 4. This needle 4 has, in line with the frustoconical recess 20, a cover 27, which collects the light coming from the frustoconical recess 20 and guides it into the elongate body of the needle 4. The body of the needle 4 comprises a light-conducting and translucent material, and is thus illuminated.

Grâce à l'invention, on obtient un indicateur de vitesses à aiguille 1 qui comprend une aiguille 11 indicatrice d'une vitesse de référence, entraînée par un moteur 13 et donc précise quant à l'indication de la vitesse, qui est compact et peu coûteux. Une seule carte de circuit imprimé 12 est nécessaire, comprenant une source d'éclairage 25 qui éclaire simultanément la portion visible de l'aiguille 11 indicatrice d'une vitesse de référence, le cadran 5 et l'aiguille 4 indicatrice de la vitesse effective du véhicule.Thanks to the invention, there is obtained a needle speed indicator 1 which comprises a pointer 11 indicative of a reference speed, driven by a motor 13 and therefore precise as to the indication of the speed, which is compact and little expensive. A single printed circuit board 12 is required, comprising a light source 25 which simultaneously illuminates the visible portion of the pointer 11 indicating a reference speed, the dial 5 and the pointer 4 indicating the effective speed of the vehicle.

Il va de soi que le cadran 5 pourrait être agencé différemment, par exemple éclairé sur l'ensemble de sa surface, avec les caractères d'indication 6, 7, sérigraphiés de façon opaque, apparaissant en ombres chinoises.It goes without saying that the dial 5 could be arranged differently, for example illuminated on the whole of its surface, with the characters of indication 6, 7, screen-printed opaque, appearing in Chinese shadows.

Le moteur d'entraînement 13 a été décrit comme un moteur unique à deux arbres coaxiaux 14, 17, mais on pourrait prévoir deux moteurs avec deux arbres désaxés, ou un unique moteur avec deux arbres désaxés, les diverses trajectoires d'indication étant adaptées à cette configuration ; avec un désaxage minimal, il est notamment possible d'avoir l'illusion que les aiguilles ont le même centre de rotation, par exemple en utilisant une deuxième aiguille dont l'épaisseur est plus grande que celle de l'évidement par lequel on la voit, impliquant qu'on ne sache pas qu'en fait on ne voit pas la même partie de cette aiguille au fur et à mesure de sa rotation.The drive motor 13 has been described as a single motor with two coaxial shafts 14, 17, but two motors could be provided with two off-axis shafts, or a single motor with two off-axis shafts, the various indication paths being adapted to this configuration; with a minimum offset, it is possible to have the illusion that the needles have the same center of rotation, for example by using a second needle whose thickness is greater than that of the recess by which it is seen , implying that we do not know that in fact we do not see the same part of this needle as it rotates.

Claims (8)

  1. Speedometer, comprising a front face (2) supporting a dial (5), a first pointer (4) indicating the effective speed, rotated in front of the dial (5), a second pointer (11) indicating a reference speed, rotated behind the dial (5) and including an end portion (22) visible at the periphery of the dial (5), and means (25) for illuminating the two pointers (4, 11) and the dial (5), said speedometer being characterised in that the illumination means comprise a single light source (25) common for the two pointers (4, 11) and the dial (5), and in that the support member (2) of the dial (15) is mounted on a light duct (8) mounted in a first light box (9), the first indicating pointer (4) conducts light, the second indicating pointer (11) conducts light, mounted in a second light box (10) to the rear of the first light box (9), a printed circuit board (12), whereon is mounted the light source (25), being provided to the rear of the second pointer (11).
  2. Speedometer according to claim 1, wherein the two pointers (4, 11) are rotated by two concentric drive shafts (14, 17) rotated by a single motor (13) mounted on the printed circuit board (12).
  3. Speedometer according to any one of claims 1 to 2, wherein the second pointer (11) comprises an arm (11'), the first end whereof comprises a hub (16) for receiving the drive shaft (14) thereof and the second end comprises a curved portion (22), the end whereof is visible at the periphery of the dial (5).
  4. Speedometer according to claim 3, wherein the arm (11') of the second pointer (11) comprises, in the vicinity of the first end thereof, at least one inclined face (26) which partially reflects the light emitted by the light source (25) in the arm (11') and allows same to pass partially towards the light duct (8), via a recess (19) formed in the first light box (9).
  5. Speedometer according to claim 4, wherein the light duct (8) is arranged to scatter the light from the light source (25), in order to illuminate the dial (5), and to allow a portion of this light to pass for the illumination of the first pointer (4).
  6. Speedometer according to claim 5, wherein the light duct comprises a light-conducting convex lens (8), including a tapered recess (20) for scattering a portion of the light emitted by the light source (25) in the lens (8), and allowing a portion of this light to pass towards the first pointer (4).
  7. Speedometer according to any one of claims 1 to 6, wherein the light source comprises at least one light-emitting diode (LED) (25).
  8. Speedometer according to any one of claims 1 to 7, which is a speedometer of a motor vehicle dashboard (1).
EP05793419.2A 2004-08-11 2005-07-27 Two-pointer speedometer for indicating an effective speed and a reference speed Not-in-force EP1782024B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0408822A FR2874265B1 (en) 2004-08-11 2004-08-11 INDICATORS OF TWO NEEDLES INDICATING AN EFFECTIVE SPEED OF REFERENCE
PCT/FR2005/001957 WO2006024747A1 (en) 2004-08-11 2005-07-27 Two-pointer speedometer for indicating an effective speed and a reference speed

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EP1782024A1 EP1782024A1 (en) 2007-05-09
EP1782024B1 true EP1782024B1 (en) 2017-04-05

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WO2006024747A1 (en) 2006-03-09
US20070252684A1 (en) 2007-11-01
US8149099B2 (en) 2012-04-03
FR2874265B1 (en) 2006-11-17
FR2874265A1 (en) 2006-02-17
EP1782024A1 (en) 2007-05-09

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